| Subject name (in Hungarian, in English) | Positive displacement pumps and compressors | |||
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Positive Displacement Pumps and Compressors
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| Neptun code | BMEGEVGBG16 | |||
| Type | study unit with contact hours | |||
| Course types and number of hours (weekly / semester) | course type: | lecture (theory) | exercise | laboratory excercise |
| number of hours (weekly): | 2 | 1 | 0 | |
| nature (connected / stand-alone): | - | coupled | - | |
| Type of assessments (quality evaluation) | mid-term grade | |||
| ECTS | 3 | |||
| Subject coordinator | name: | Dr. Hős Csaba János | ||
| post: | university professor | |||
| contact: | cshos@hds.bme.hu | |||
| Host organization | Department of Hydrodynamic Systems | |||
| http://www.hds.bme.hu/ | ||||
| Course homepage | http://www.hds.bme.hu/oktatas.php?sm=1&lang=EN&xml=BMEGEVGBG16 | |||
| Course language | english | |||
| Primary curriculum type | mandatory | |||
| Direct prerequisites | Strong prerequisite | none | ||
| Weak prerequisite | ||||
| Parallel prerequisite | ||||
| Milestone prerequisite | at least obtained 0 ECTS | |||
| Excluding condition | none | |||
Aim
The aim of the course is to give an overview of positive displacement pumps and compressors, both in terms of the underlying physical principles and the theoretical understanding of applications. The course focuses on the mathematical description of the operation of positive displacement machines (e.g., piston pump, compressor), thus estimating pressure, volume flow, and power. The hydraulic behaviour of such pumps and pipes connected in series and parallel, as well as simple piping systems, is also part of the curriculum. The sizing of simple hydraulic circuits and pulsation dampers is also covered.
Learning outcomes
Competences that can be acquired by completing the course
Knowledge
The student is familiar with the thermodynamic processes (isothermal, isentropic, polytropic compression, specific work, efficiency) that take place in positive displacement machines. The student knows basic types of pumps (turbopumps, positive displacement pumps). The student is aware of the concepts of theoretical and real characteristic curves. The student distinguishes the origin of losses in flow engineering machines and the methods of estimating them. The student is aware of the concept of cavitation and the possibilities of avoiding it. The student understands the concept of a pipeline characteristic curve and the method of determining it. The student knows the main aspects of selecting and sizing air ducts. The student is aware of the operation of reciprocating compressors. The student is familiar with the control possibilities of hydraulic processes. The student compares the advantages of using positive displacement pumps.
Ability
The student calculates basic hydraulic and thermal parameters for reciprocating compressors. The student estimates the pressure drop of a simple pipeline, including fittings. The student is capable of hydraulic testing of flow engineering systems. The student is familiar with the basic measurement methods and tools related to fluid flow machines. The student is capable of estimating piston pump delivery. The student determines the required air gap size under different technical requirements. The student can analyze the operation and operation of reciprocating compressors. The student can analyze the control possibilities of hydraulic processes. The student can determine the energy efficient operation of hydraulic circuits. The student can distinguish between the applications of positive displacement pumps.
Attitude
The student constantly monitors his/her work, results and conclusions. The student seeks to learn about and routinely use the system of tools needed to solve flow engineering problems. The student is open to the use of information technology tools. The student seeks to enforce the principles of energy efficiency and environmental awareness. The student develops your ability to provide accurate and error-free problem solving, engineering precision and accuracy.
Independence and responsibility
The student collaborates with the supervisor to expand knowledge. The student openly accepts well-founded professional and other critical remarks. In some situations, as part of a team, The student works with his/her fellow students to solve tasks. With his/her knowledge, the student makes a responsible, informed decision based on his/her analysis. The student independently thinks through tasks and problems and solves them based on the given resources. The student is committed to the principles and methods of systematic thinking and problem solving.
Teaching methodology
The material of the lectures is primarily used to understand the curriculum. The development of homework issued as a project in group work is aided by both communication and work organization techniques; acquisition of both independent engineering work and curriculum. In the example-solving practice, students get to know the methods of problem-solving / scaling through numerical examples and are also prepared for the exam.
Support materials
Textbook
Positive Displacement Pumps: A Guide to Performance Evaluation, 2007, ISBN: 9780470180976
Heinz P. Bloch and John J. Hoefner: Reciprocating Compressors, Elsevier, 1996, ISBN 978-0-88415-525-6
Lecture notes
Csaba Hős: Positive Displacement Pumps and Compressors, 2020, lecture notes
Online material
Validity of the course description
| Start of validity: | 2021. February 1. |
| End of validity: | 2026. July 15. |
General rules
The mid-term evaluation of the learning outcomes is performed as follows: students deepen the material of the lecture with the help of three mid-year project tasks. In addition, the semester of the course is assessed on the basis of the timely submission of the project documentation prepared at home and the active participation in the example-solving exercises. The subject ends with a written examination.
Assessment methods
Detailed description of mid-term assessments
| Mid-term assessment No. 1 | ||
| Type: | formative assessment, simple | |
| Number: | 3 | |
| Purpose, description: | Through three complex homework assignments, students become deeply acquainted with the curriculum. The first project is to develop a piston pump with a prescribed flow rate and a pulsation damper. The second homework is to design a simple hydraulic circuit that includes a motor / cylinder and pressure coil valve assembly. All of these items should be selected from industry catalogs. The third project is the analysis of a reciprocating compressor. | |
| Mid-term assessment No. 2 | ||
| Type: | diagnostic assessment | |
| Number: | 1 | |
| Purpose, description: | The test measures the student's knowledge with numerical examples and multiple choice questions. It contains both numerical and theoretical problems, covering the material throughout the semester. We use both single-choice and multi-answer multiple-choice questions. Sample questions and answers are provided throughout the semester, ensuring that students can prepare in advance for a successful test. We also provide personal consultations. | |
Detailed description of assessments performed during the examination period
The subject does not include assessment during the examination period.
The weight of mid-term assessments in signing or in final grading
| ID | Proportion |
|---|---|
| Mid-term assessment No. 1 | 60 % |
| Mid-term assessment No. 2 | 40 % |
The condition for signing is that the score obtained in the mid-year assessments is at least 50%.
The weight of partial exams in grade
There is no exam belongs to the subject.
Determination of the grade
| Grade | ECTS | The grade expressed in percents |
|---|---|---|
| very good (5) | Excellent [A] | above 90 % |
| very good (5) | Very Good [B] | 85 % - 90 % |
| good (4) | Good [C] | 72 % - 85 % |
| satisfactory (3) | Satisfactory [D] | 65 % - 72 % |
| sufficient (2) | Pass [E] | 50 % - 65 % |
| insufficient (1) | Fail [F] | below 50 % |
The lower limit specified for each grade already belongs to that grade.
Attendance and participation requirements
Must be present at at least 70% (rounded down) of lectures.
At least 70% the exercises (rounded down) must be actively attended.
Special rules for improving, retaken and replacement
The special rules for improving, retaken and replacement shall be interpreted and applied in conjunction with the general rules of the CoS (TVSZ).
| Can the submitted and accepted partial performance assessments be resubmitted until the end of the replacement period in order to achieve better results? | ||
| NO | ||
| Taking into account the previous result in case of improvement, retaken-improvement: | ||
| new result overrides previous result | ||
| The way of retaking or improving a partial assessment for the first time: | ||
| partial assesment(s) in this group can be improved or repeated once up to the end of the repeat period | ||
Study work required to complete the course
| Activity | hours / semester |
|---|---|
| participation in contact classes | 42 |
| mid-term preparation for practices | 7 |
| elaboration of a partial assessment task | 12 |
| additional time required to complete the subject | 29 |
| altogether | 90 |
Validity of subject requirements
| Start of validity: | 2020. February 1. |
| End of validity: | 2026. July 15. |
Primary course
The primary (main) course of the subject in which it is advertised and to which the competencies are related:
Mechanical engineering
Link to the purpose and (special) compensations of the Regulation KKK
This course aims to improve the following competencies defined in the Regulation KKK:
Knowledge
- Student is familiar with the general and specific mathematical, scientific and social principles, rules, contexts and procedures needed to operate in the field of engineering.
- Student has the broad theoretical and practical knowledge, methodological and practical skills for the design, manufacture, modelling, operation and management of complex engineering systems and processes.
- Student has the knowledge of the theories and contexts of fundamental importance in the field of engineering and of the terminology which underpins them.
Ability
- Student has the ability to apply the general and specific mathematical, scientific and social principles, rules, relationships and procedures acquired in solving problems in the field of engineering.
- Student has the ability to organise cooperation with experts from related disciplines in problem solving.
- Student has the ability to apply the theories and related terminology in an innovative way when solving problems in a given field of engineering.
Attitude
- Student is open and receptive to learning, embracing and authentically communicating professional, technological development and innovation in engineering.
- Student strives to plan and carry out tasks to a high professional standard, either independently or in a team.
- Student strives to carry out their work in a complex approach based on a systems and process-oriented thinking.
Independence and responsibility
- Student shares her acquired knowledge and experience through formal, non-formal and informal information transfer with those in her field.
- Student has the ability to work independently on engineering tasks.
- Student acts independently and proactively in solving professional problems.
Prerequisites for completing the course
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Knowledge type competencies
(a set of prior knowledge, the existence of which is not obligatory, but greatly facilitates the successful completion of the subject) |
none |
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Ability type competencies
(a set of prior abilities and skills, the existence of which is not obligatory, but greatly contributes to the successful completion of the subject) |
none |